I just got a Framework 16, installed Ubuntu 24.04 on it, and have been going through this exact struggle after avoiding it for many years. The screen DPI is just high enough that it's uncomfortable for me to use at 100% scale, so I set it to 125%, but any non-Wayland application would get artificially resized and look blurry.
There's a pending Mutter MR[1] to allow XWayland applications to handle the scaling themselves (which IntelliJ IDEs can do) but it hasn't been merged yet, and I'm probably never gonna see it on 24.04 anyway. Apparently KDE already supports this, but the Gnome folks have been reluctant to adopt the same approach.
I ended up going back to 100% scaling, increasing the system font size, and then setting `GDK_DPI_SCALE=1.25` in `/etc/environment` to tell all GTK programs to increase their scale. It's not perfect, but most things are the right size. I definitely would not have wanted to switch to Wayland any sooner than this though. Transitional periods are such a pain.
There's a pending Mutter MR[1] to allow XWayland applications to handle the scaling themselves (which IntelliJ IDEs can do) but it hasn't been merged yet, and I'm probably never gonna see it on 24.04 anyway. Apparently KDE already supports this, but the Gnome folks have been reluctant to adopt the same approach.
I ended up going back to 100% scaling, increasing the system font size, and then setting `GDK_DPI_SCALE=1.25` in `/etc/environment` to tell all GTK programs to increase their scale. It's not perfect, but most things are the right size. I definitely would not have wanted to switch to Wayland any sooner than this though. Transitional periods are such a pain.
[1]: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3567